} elseif (isset($_GET['unset_course_only']) && eF_checkParameter($_GET['unset_course_only'], 'id')) {
//The administrator asked to deactivate a lesson
if (isset($currentUser->coreAccess['lessons']) && $currentUser->coreAccess['lessons'] != 'change') {
echo urlencode(_UNAUTHORIZEDACCESS);
exit;
}
try {
$lesson = new EfrontLesson($_GET['unset_course_only']);
$lessonCourses = $lesson->getCourses();
if (!empty($lessonCourses)) {
throw new Exception(_THISLESSONISPARTOFCOURSESANDCANNOTCHANGEMODE);
}
if (G_VERSIONTYPE == 'educational') {
#cpp#ifdef EDUCATIONAL
$lesson->removeCoursesInheritedSkills();
$lesson->insertLessonSkill();
}
#cpp#endif
$lesson->lesson['course_only'] = 0;
$lesson->persist();
echo "0";
} catch (Exception $e) {
handleAjaxExceptions($e);
}
exit;
} elseif (isset($_GET['set_course_only']) && eF_checkParameter($_GET['set_course_only'], 'id')) {
//The administrator asked to activate a lesson
if (isset($currentUser->coreAccess['lessons']) && $currentUser->coreAccess['lessons'] != 'change') {
echo urlencode(_UNAUTHORIZEDACCESS);
exit;
}